TWO CONCENTRATIONS OF OB STARS
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Observatorio Astrofísico de Tonantzintla, Pue, Pue, Mex
Abstract
A survey of faint OB stas is being carried out at Tonantzintla Observatory within galactic longitude 180° to 240° and to photographic magnitude 13. We found 2 concentrations of OB high luminosity stars. We will adopt the nomenclature I Pup and I Vel for t